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Marshall amp knobs

BrianGWN

Great 'Double White' North ~ Electronics Specialis
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Jul 15, 2001
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Anybody happen to know where someone might be able to get their hands on a few knobs for the infamous Marshall JMP tube amps of the 1970s? We are talking about the set screw type not push on. It looks like the currently available new Marshall replacement set screw knobs are somewhat different, they are a little larger in diameter and the set screw is not slotted but instead would require a hex/allen key to install.
 

CAPT CRUNCH

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May 17, 2002
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1,372
Thanks, but those knobs (brown w/gold) dont work for my 73sl?? Am I missing something??
 

CAPT CRUNCH

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May 17, 2002
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Tubes

Did you buy the silver (nos) knob??? I cant tell from the pic if that is what I need for my 73..........thanks
 

Tubes

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Oct 10, 2001
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I have a 73 superlead and the brown is what i use....i think that its correct for the year .i think the silver and white knobs are for the 60's jtm45 amps only...
 

CAPT CRUNCH

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Maybe mine are all wrong?? They look black with silver colored centers?? Mine is also a 73 Superlead 100. I'm at work so I cant look at them. Do yours have silver centers?? thanks
 

blauserk

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Mar 12, 2002
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1,770
If you wind up going with brown and gold, I found that Hoffmanamps.com is the fastest and easiest to deal with. (They are hex-screw type, however.) The LARGEST assortment of amp knobs I've seen is at vibroworld. I dunno what your knobs look like, but they have black ones with silver centers.


http://www.vibroworld.com/parts/tech9.html#knob
 

CAPT CRUNCH

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May 17, 2002
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Got home and looked..........mine are brown with silver centers with the straight head set screw........anyone know if these are correct??...........thanks
 

BIG Dave

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Aug 18, 2001
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My '71 JMP50 has brown knobs with a silver 1/2" cap. I think the caps were originally gold but turned to a silver color over the years. The Marshall reissue knobs are brown with a gold 5/8" cap.
 

BrianGWN

Great 'Double White' North ~ Electronics Specialis
Joined
Jul 15, 2001
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1,401
First, I think the silver versus gold cap thing is deceiving. I understand with the 70s JMP knobs the cap was and still has a gold tint coating, it's just as BigDave mentioned in that with enough years of handling the gold wears off. At first I thought my 1973 100W knobs had silverish caps but no they are the normal brown body with originally gold tinted caps.

I checked those web sites listed in this thread, thanks to those who supplied the URLs to those sources. It appears they are offering the current Marshall replacement gold cap knob with hex set screw. Those are slightly larger than the originals from the 70's, I can get those locally no problem. I am lead to believe that replacements that closely match the originals are no longer made, so I guess what I am really looking out for are some NOS or maybe used/salvaged original knobs specifically with the slotted set screw.
The search will continue...
Hey RICH/Marshallhead, know of any somewhat abused original JMPs maybe with blown transformers that got salvaged for parts maybe including the knobs? =( ;) (By the way I don't think there would be any Marshall disrespect in that, it would sort of be like a soldier going down with a bad mortal head wound but the M.A.S.H. unit transplanting the liver and kidneys and heart to save the lives of a few other soldiers...;))
 

CAPT CRUNCH

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Damn, I just need one center cap........It's like drivin' your chebby with one hub cap missin'.....
 

BIG Dave

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Aug 18, 2001
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www.angela.com sells NOS caps. Here is the ad:

11. Gold face caps for older Marshall knobs, with black indicator line, the exact part used on vintage Marshall amps. Made in Germany circa '68, mint condition factory surplus parts, just crazy glue 'em to the front of your old knobs. EACH $10

Click on 'Guitar Amp Parts', then 'Marshall and Other Amplifier Parts'...
 
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